Down the hole rock tools (drilling tools) are rock drilling
equipment which takes compressed air as power source to partially
transfer impact power into drilling holes. An air distributing
device in a top hammer controls a piston to move back and forth. An
impact device arranged in the front of the top hammer transfers the
impact powderto a down-the-hole bit to crush rocks.

1. according to China's mining conditions, to absorb the advanced
technology of domestic and foreign impactor and design and
manufacture of the latest products.

4. can provide hardening treatment in order to prolong the service
life and reduce the cost of use.

5. single impact power is large, and the power consumption of
broken rock is low.

6. piston and bit weight to have the best momentum transfer.

7. the modern theory is adopted in the structural design, which
makes the stress wave duration longer, the stress amplitude is
lower, and the piston life is long.

Applications

It is mainly used in geological exploration, coal mine, water
conservancy and hydropower, highway, railway, bridge, construction
and so on.

Specifications

NQL SeriesHigh Air Pressure DTH Hammers Without Foot Valve

Technical Data

Length

(Without Bit)

NQL4A

NQL5A

NQL6A

NQL8A

NQL95A

1070mm

1090mm

1183mm

1330mm

1340mm

Weight

(Without Bit)

40.00kg

67.00kg

90.00kg

171.00kg

203.00kg

External

Diameter

Ø99mm

Ø126 mm

Ø165mm

Ø180/Ø185mm

Ø203mm

Bit

Shank

QL40

QL50

QL600

QL80

QL80

Hole

Range

Ø110-

Ø135mm

Ø155-

Ø203mm

Ø155-Ø203mm

Ø195-Ø254mm

Ø216-Ø254mm

Connection

Thread

API2 3”/8REG

API2 3”/8REG

API3 1”/2REG

API2 7”/8REG

API3 1”/2REG

API4 1”/2REG

API4 1”/2REG

Working

Pressure

1.2-2.0Mpa

1.3-2.3Mpa

1.5-2.5Mpa

1.5-3.0Mpa

1.8-3.0Mpa

Impact Rate

at 17 Bar

30HZ

28HZ

25HZ

22HZ

22HZ

Recommended

Rotation

Speed

20-30r/min

20-35r/min

20-30r/min

15-25r/min

15-25r/min

Air Consumption

1.0Mpa:

5.0m³/min

1.8Mpa:

9.0m³/min

2.4Mpa:

14.0m³/min

1.0Mpa:

7.0m³/min

1.8Mpa:

14.0m³/min

2.4Mpa:

19.0m³/min

1.0Mpa:

9.0m³/min

1.8Mpa:

18.0m³/min

2.4Mpa:

26.0m³/min

1.0Mpa:

12.0m³/min

1.8Mpa:

22.0m³/min

2.4Mpa:

28.0m³/min

1.0Mpa:

16.0m³/min

1.8Mpa:

28.0m³/min

2.4Mpa:

39.0m³/min

Feature Advantage

1. Price commitment: in order to ensure the high reliability of
products, raw material selection are using grapefruit brand
products; under the same competitive conditions, and not to reduce
product technical performance on the basis of sincerity at a
favorable price to customers.

2. Quality commitment: product manufacturing and testing have
quality records and inspection data; the performance of the product
can withstand customer inspection.

3. Customer service: in order to create new diamond brand, enhance
the visibility of enterprises,establish corporate image, we serve
customers with the principle of "preferential prices, good service,
reliable product quality" principle.

The appearance of the picture is different from that of the actual
product, and the actual product is the standard.